AM1808_14 Datasheet, PDF (237/265 Pages) Texas Instruments – Microprocessor

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AM1808
SPRS653E – FEBRUARY 2010 – REVISED MARCH 2014
6.30.1 Timer Electrical Data/Timing
Table 6-130. Timing Requirements for Timer Input^{(1) (2)} (see Figure 6-80)
1.3V, 1.2V, 1.1V, 1.0V
NO.
UNIT
MIN
MAX
1 t_{c(TM64Px_IN12)} Cycle time, TM64Px_IN12
2 t_w(TINPH)
Pulse duration, TM64Px_IN12 high
3 t_w(TINPL)
Pulse duration, TM64Px_IN12 low
4 t_{t(TM64Px_IN12)} Transition time, TM64Px_IN12
4P
0.45C
0.45C
ns
0.55C
ns
0.55C
ns
0.05C or 10⁽³⁾ ns
(1) P = OSCIN cycle time in ns.
(2) C = TM64P0_IN12 cycle time in ns. For example, when TM64Px_IN12 frequency is 27 MHz, use C = 37.037 ns
(3) Whichever is smaller. P = the period of the applied signal. Maintaining transition times as fast as possible is recommended to improve
noise immunity on input signals.
1
2
3
4
4
TM64P0_IN12
Figure 6-80. Timer Timing
Table 6-131. Switching Characteristics Over Recommended Operating Conditions for Timer Output ⁽¹⁾
NO.
PARAMETER
5 t_w(TOUTH)
Pulse duration, TM64P0_OUT12 high
6 t_w(TOUTL)
Pulse duration, TM64P0_OUT12 low
(1) P = OSCIN cycle time in ns.
1.3V, 1.2V, 1.1V, 1.0V
MIN
MAX
4P
4P
UNIT
ns
ns
TM64P0_OUT12
5
6
Figure 6-81. Timer Timing
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Peripheral Information and Electrical Specifications 237
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